2. The Yooyuball Graffiti Background all depends on a few factors. First of course is if you want one then go right ahead. If not, if you're willing to wait to find a buyer and not want to buy a batch of stamps than I would also say it wouldn't be that bad of a choice, I think easier than the dress (and as I said, they sell for about the same). You have enough points for two but that's up to you if you want to get two, personally I think one is enough.

3. Whether you purchased a background or not, I would then suggest getting a many stamps as possible. They're ETS and, if you hold onto them long enough, go up in price over time.

4. Finally, for the smaller prizes, I would suggest getting books, non-Jersey wearables, and the Yooyu Knuckle Dusters. I specified not getting the Jersey since you can buy them cheap on the Shop Wizard if you really wanted one.

5. With a BD event supposedly coming, it might not be a bad idea to stock up on a few Yooyu Knuckle Dusters. They're very good weapons and I can see them becoming a new BD standard, meaning when the battles come their price will skyrocket (even right now what they sell for isn't bad for how many points they are).

7. The Altador Cup Armours I would suggest getting only for the team you want, otherwise I'd instead suggest getting the book underneath them (yes, the Armours sell for more though they might be HTS since everyone probably already got the one they want and I don't think their BD stats are that great).

This isn't my real Neopets username, but anyway.... PANIC.
I only just recently learned that May 12th was the shop closing date. I don't know where that date came from, though! D:
I didn't see a date mentioned in the New Features, nor the Help section on Neopets!
In my haste, even though it was the 14th, I followed Herdy's link to the prize shop with 2015 in the url instead of 2016.
I then went &, even though it was the 14th, spent my 10K+ points on Knuckle Dusters, 3 or so Stamps, & junk.

Now I'm worried because I just realized I used the old prize shop link to buy from an otherwise CLOSED prize shop! So I'm worried that if I do try to sell some of this stuff -or even if I don't!- I might get banned for glitch exploitation or suspicious activity!
My account is over a decade old & I'm scared I'll lose it because of my haste! What do I do?!

Well then, if it is the 2016 shop, then what of the fact that I bought items from a shop when (On today, the 14th.) it was supposed to be officially closed? TNT had mentioned it earlier in NF.
....Is there any precedent for stuff like this, such as what's mentioned by the editorial?